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Volcanic Seismicity detected at Axial Seamount

InterRidge Office mac at ext.jussieu.fr
Wed Jan 28 06:09:05 EST 1998

No. 4 of the 1998 Series of E-mail Announcements from the InterRidge Office
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Beginning at 1200 GMT on 25 January 1998, intense seismicity was
detected in the northeast Pacific Ocean using the T-phase Monitoring
System developed by NOAA/PMEL to access the U.S. Navy's SOund
SUrveillance System (SOSUS). This episode appears to be the most intense
yet observed by PMEL's monitoring effort.

The initial activity was located on the summit and southern flank of
Axial Seamount on the central Juan de Fuca Ridge near 45 55'N and 130
00'W, approximately 300 miles west of Cannon Beach, Oregon.

A possible response effort is being organized by NSF/RIDGE and
NOAA/VENTS investigators.

A web site has been established by PMEL to keep the community informed
of seismic activity and response efforts at:


This page will be updated daily while the activity continues.

-Chris Fox (fox at pmel.noaa.gov) and Bob Dziak (dziak at pmel.noaa.gov)
Newport, Oregon

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